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Satisfacción de los profesores con los servicios bibliotecarios de la Corporación Universitaria Lasallista, agosto de 2003
(Corporación universitaria Lasallista, 2004) Rodríguez Gázquez, María de los Ángeles; Uribe Londoño, Luz María
Introduction:User’s satisfaction is an indicative of the quality of the library’s services, evaluated from the perspective of Faculty members as customers of same service. Objetive: To describe the satisfaction level of the Faculty members with the services provided by the library. Materials and Methods: A descriptive study was made, using as an instrument to acquire the information a self-applied questionnaire. The satisfaction with the library services was evaluated through a 60 items scale, graded from 1 to 5, giving a 1 grade to total discomfort and 5 to a maximum satisfaction. The information was put in a data base made with a SPSS vr. 11.5 statistic software, with which the tabulation plan was made. Results: A total of 70 faculty members were surveyed. During last semester, three out of five of them used the library services one or more times per week, considering this as an appropriate frequency of use. The general satisfaction with this service was graded with a 4.0. According to the faculty’s opinion, the information resources offered by the library are enough, although they suggest an increase in the quantity and quality of books and journals. Conclusion: There is an adequate satisfaction of the Corporación Universitaria Lasallista´s faculty members with the services provided by its library.
Mesofauna de los colémbolos en el compost de la Corporación Universitaria Lasallista
(Corporación Universitaria Lasallista, 2004) Arango Gutiérrez, Gloria Patricia; Macías Mazo, Karina Isabel
Samples were taken by using the falling traps method, putting three traps in each composter at a 20-30 cm depth from the surface. The collection of collembolas was done three times a week, during three months, in 2003. The collected organisms were duly cured, to be taxonomically identified afterwards.
Curvas de crecimiento de crías de vacuno levantadas en la Corporación Universitaria Lasallista
(2004) Agudelo Gómez, Divier Antonio
Introduction: One of the problems found in cattle exploitations is to typify the weighting of calves so they can be compared. To the moment, the most common practice in those exploitations is a lineal interpolation between two consecutive weightings, method that imposes severe restrictions concerning the period of time between weightings and determines the elimination of a great number of registrations. Objective: To make a graphic representation of the growth curves of four calves, in order to obtain the most appropriate equation for a better adjustment. Materials and methods: Four calves were monitored during 8 months (two Holstein cow calves, a Holstein bull calf and a mixed male bull calf, all of them born in close dates), the growth system used was bucket-stake. The males consumed milk until they were 85 days old and the females until they were 70, every day they were given 4 litters of milk-replacer: Processed cattle food was given to them until their fifth month, and in this period each animal consumed 12 kg for a daily media rate of 80 gr. When they were two months old, the bucket-stake system was changed to a rotatory cattle keeping system on Pennisetum clandestinum grass (kikuyu). Since their first month of life, they were given 10 kg of Arachis pintoi (forage peanut) not dehydrated, coming from the pruning of the garden keepers from the Corporación´s facilities. The data collection was made every week using a bovine metric tape. Results: A total number of 31 observations was obtained. The growth speed was higher in the bull calves, fact that can be explained by the higher consuming of milk replacer, because they had more access to it. The daily rate of weight gain was 589gr and 518 for the males and the females, respectively.
Interacciones entre comunicación, desarrollo y cultura en Colombia
(Corporación Universitaria Lasallista, 2004) Tous Ramírez, Juan David
Communication, from a theoretical point of view, is not considered as a science. It is a field of study, a gathering point for a wide number of disciplines, because it is seen from different sciences and this has made the “communication theory” a very complex universe. Other words as “development” and “culture” have similar characteristics. Each science uses them as terms and epistemological tools in different ways. In the case of Colombia, communication, development and culture have been extremely important words in the social science studies, and our exercise in this work is a look at some interactions these terms have had in the recent history of the country.
Fotodegradación con TiO2 del colorante Rojo Amaranto en aguas
(Corporación Universitaria Lasallista, 2004) Garcés Giraldo, Luís Fernando; Mejía Franco, Edwin Alejandro; Peñuela Mesa, Gustavo Antonio
Introduction: Sensitivized biodegradation, with TiO2 and sun light, is a technique which can be used as a depuration system by itself, or as a tertiary process, especially for industrial remains treatment. Photocatalytical technologies are very promising for their application on the solving of water contamination problems. Those technologies are very well regarded to be implemented, because the use of sun light reduces in a great measure the costs of the treatment. The use of this technique to degrade and mineralize the Amaranth Red Dye, can be implemented as a more appropriate alternative than other traditional oxidation processes. Objective: To study heterogeneous catalysis of Amaranth Red dye, by the use of a sun light collector and titanium oxide as a catalyst. Materials and methods: For the photocatalysis process, a composed cylinder parabolic sunlight collector (CPC) was used and the conditions under which the higher measurements of color removal were gotten were analyzed. The variables analyzed for this purpose were the concentration of the catalyst (TiO2), the hydrogen peroxide concentration and the relation between both of them before the degradation and mineralization of the color. Results:For this work synthetic solutions dyed with 100mg/L Amaranth Red color prepared with potable water. The most influent parameter on the degradation percentages reached, is the use of TiO2 mixed with hydrogen peroxide. The maximum degradation percentage obtained was 93.48% for titanium dioxide concentration of 150mg/L and 2 ml/L of hydrogen peroxide. Conclussion: The used of appropriate concentrations of TiO2 and H2O2 allows to obtain good degradation and mineralization percentages of the Amaranth Red Dye contained in water.
Ciencia, Libertad y Ética Una mirada paradigmática
(Corporación Universitaria Lasallista, 2004) Uribe Cano, Juan Manuel
Brief:This article is intended to show how, and despite of the overwhelming development of science during the 20th Century, a concept of ethics that a “humanizing project” can fit and be the main objective of such development and progress. In this context, we have the fact that science has moved far from the world of life, in which the reality of social and individual beings takes place, progressly becoming an instrument for isolation and not a way to drive human beings to their freedom.
Sinergia entre edulcorantes no calóricos y el ácido fumárico
(Corporación Universitaria Lasallista, 2004) Restrepo Gallego, Mauricio
Given the great demand of sugar-free products it is necessary to find new applications for traditional products and additives. This is the case of the fumaric acid, for which a sweetener or sweeteners mixture that grants a good level of synergy in products like powder beverages is being searched. The current investigations suggest that the encapsulation process is the best alternative to achieve a good balance between acidulants and sweeteners, taking advantage of their physicochemical and sensorial qualities.
Los coleópteros y el compost
(2004) Arango Gutiérrez, Gloria Patricia; Vásquez Villegas, Erika María
Coleopteras are well known as among the coleoptera order we have the Scarabaideae and Sthaphylinaidae families that help to degradate the organic material, although there is not a thorough knowledge of the conditions under which they act. It is very important to obtain information on how to help to improve the quality of compost, because many benefits would be obtained in several aspects. The compost is of the best organic fetillizers that can be obtained in an easy way. Coleopteras can be present as one link of the alimentary chain, performing as decomposers or transformers of solid organic waste.
Arequipe con fruta, alternativa agroindustrial para aumentar valor agregado
(Corporación Universitaria Lasallista, 2004) Cortés Arango, Astrid Lorena; Ortega Arellano, Lucila María
A research was made taking advantage of the high acceptation consumers have of the traditional product known as arequipe, and an added value was given to it by the addition of natural fruit’s fruits flavor. Our aim was to develop a new product with the desired characteristics of taste, odor and color which are the appropriate for each fruit, without affecting some of the organoleptic properties of the arequipe, such as its soft texture and its mellow consistence, which allows it to be softly sproden on other foods.
La biofiltración, una alternativa para la potabilización del agua
(Corporación Universitaria Lasallista, 2004) Arango Ruiz, Álvaro de Jesús
In current times, the population from developing countries is experiencing a lack of basic sanitary conditions, including the potable water to satisfy their needs. The lack of water potabilization is associated to illness and death among children because of hydric origin diseases. The lack of water available and properly treated for human use, brings the need to get interested on innovative projects in this field, as biofiltration, introducing efficient treatment, potabilization and distribution alternatives which must be easy to be reached and economically viable for the people.
Satisfacción de los graduandos con la formación recibida en la Corporación Universitaria Lasallista, marzo de 2004
(Corporación Universitaria Lasallista, 2004) Rodríguez Gázquez, María de los Ángeles
Introduction: The opinion of the university community is very important to establish a perception of the quality in the tuition received. The people which are just about to get their degrees are the ones who can be evaluated in the most sensitive way, under terms of satisfaction with their professors, deans, the course plans and the different academic and administrative processes which are pertaining to their studies. Objective: To evaluate the satisfaction rate of the alumni with the tuition received from Corporación Universitaria Lasallista, with the aim of obtaining useful information and define actions in order to increase the quality of the undergraduate programs. Materials and methods: A descriptive study was made, using as information collector a self-applied survey. The satisfaction was graded in values from 0 to 5 (0 for a total insatisfaction and 5 for a maximum satisfaction). The information was verted on a data base designed for the study, made with SPSS vr.11 software, and a statistical analysis was made by using the same software. Results: In general, a very good satisfaction level with tuition, professors and deans of the programs was registered. Conclussions: It is very satisfactory for Corporación Universitaria Lasallista that the alumni from March 2004 have an adequate satisfaction level with the tuition provided by the institution in their undergraduate studies.
Estilos de vida saludables de los estudiantes de la Corporación Universitaria Lasallista. Agosto 2004
(Corporación Universitaria Lasallista, 2004) Rodríguez Gázquez, María de los Ángeles; Castañeda Gallego, Alba Doris; Correa Vargas, Lía Rosa; Sarabia Londoño, Mauricio
Introduction: Heart diseases are a frequent cause of illness and death in our country. There is enough scientific evidence that shows that healthy life styles prevent the appearing of those diseases. Objective: To establish the frequency of exposition to risky factors concerning heart diseases for Corporación Universitaria Lasallista´s students, aiming to acquire information that helps in the development of strategies for avoiding those factors. Materials and methods: A descriptive study was made, using a self-applied survey to get the information. After criticizing the collected data, a data base in the SPSS vr. 11.00 software was created, and this was also used to process the information. In the analysis for hypothetical proofs, these were contrasted with the X2 test when prevalences were compared, and with the t student t´test when the comparison of media rates was made. The statistic significance was assumed when the probability value was les than 0.05. Results: A considerable proportion of the students have inadequate life styles, and this means procrastinated risks for heart disease. Some conducts were particularly worrying, as the total lack of exercise (48%), smoking (36%) and weight increase (overweight 9.5% and obesity 0.5%). The data showed that women have better protective behaviors than men, concerning heart diseases. Conclusion: Corporación Universitaria Lasallista´s students have a considerable measurement of exposition to risky factors concerning heart diseases, through their life styles. Therefore, the adoption of strategies to create healthier life styles among them, is recommended.
Extracción de taninos presentes en el banano verde
(Corporación Universitaria Lasallista, 2004) Velásquez Valderrama, Ángela María
Introduction: Green rejected bananas are a remain from harvests, they contain high quantities of tannins and polyphenols and low contents of fibers and proteins. Tannins are antinutritional substances, and that is why they do not allow the use of rejected green bananas (“boleja”) in animal feeding, as an energy source. The selective extraction with solvents is a route of separation to obtain tannins. The results shown in this work are an evidence that this separation method is effective to remove tannins from the “boleja”. Objective: Extract the tannins from rejected green bananas (“boleja”) using the extraction with solvents. Materials and methods: The obtaining of alcoholic and watery extracts and their qualitative evaluation was made by combining different extraction and qualitative tannin´s determination procedures, thoroughly shown in the chemical and instrumental analysis literature. The quantitative tannin´s analysis was made by colorimetric methods, using a UV/VIS spectrophotometer in which the samples were read at 700 mn and referred to tannic acid. As a reference substance tannic acid from the Merck brand was used. To measure the absorbing rate a UV-VIS SPECTRONIC-20 spectrophotometer was used. Results: the lineal correlation coefficients calculated for the calibration curves were: From tannic acid: 0.9983, from sample A –alcoholic extract: 0.9977, from sample A –watery extract: 0.9822, from sample B: -Alcoholic extract: 0.9999 and from sample B watery extract: 0.9938. Conclusion: The extraction of tannins from rejected green bananas (“boleja”) with a 1:1 methanol-water solution is more efficient and effective than tannin´s extraction with water.
Ensilaje como fuente de alimentación para el ganado
(Corporación Universitaria Lasallista, 2004) Garcés Molina, Adelaida María; Berrío Roa, Lorena; Ruíz Alzate, Santiago; Serna D´León, Juan Guillermo; Builes Arango, Andrés Felipe
Ensilage is the anaerobic fermentation of soluble carbohydrates which are present in forages to produce lactic acid. This process allows the increase of the number of animals per hectare and replace or complement concentrated foods. Its quality is affected by the chemical composition of the substance that is going to be ensiled, the weather and the microorganisms used, among other factors. The silage is kept in special trenches that allow the anaerobic condition, there are several kinds and the criteria to choose the appropriate one depends of the kind of cattle exploitation, the economical resources available and the topography of the terrain, among other factors.
Los residuos sólidos municipales como acondicionadores de suelos
(Corporación Universitaria Lasallista, 2004) Puerta Echeverri, Silvia María
The compostation made from organic remains produced by municipals, can be a liability and cause damage when used as soil conditioners, because of the excess of inert materials, stinking emissions, high salinity levels, toxicity due to organic contaminants or heavy metals, immaturity of the process and the presence of pathogenic organisms. Given all this factors, it is necessary to evaluate all of the physical, chemical and microbiological parameters of the process, keeping in mind the corresponding Colombian laws on the subject, which regulates the organic materials used as fertilizers and soil conditioners in Colombia: Colombian Technical norm 5167 and the resolution 00150 of January 21st of 2003, made by the Colombian Agro-Cultural Institute, ICA.
Mesofauna de las hormigas en el compost de la Corporación Universitaria Lasallista
(Corporación Universitaria Lasallista, 2004) Arango Gutiérrez, Gloria Patricia; Piedrahita Vera, Lina María
Introduction: The organisms that belong to Formicidae family are biologically and ecologically important in the vegetal material´s decomposition process generated in the Corporación Universitaria Lasallista, in Caldas, Antioquia, Colombia. Objective: By a taxonomic identification of each collected species, we aimed to determine and evaluate all of the different functions and behaviors they perform in the transformation of compost, in order to use the information as a parameter to establish an optimum quality and production standard for that compost. Materials and Methods: The organism’s samples were obtained by the falling traps method. This collection process was made during the months of March, April and May of 2003. They were cured and later identified by using the Serna´s and Vergara´s taxonomy keys. Results: Five sub-families of ants were found in the Corporación Universitaria Lasallista´s composters: ECITONINAE, PONERINAE, MYRMICINAE and FORMICIDAE.Conclussion: A big number of ant species were found, probably due to the high presence of other insects which are a food source for ants that usually hunt other kinds of arthropods.
Una visión al mundo de la búsqueda y recuperación de la información electrónica
(Corporación Universitaria Lasallista, 2004) Echavarría Ramírez, Andrés Felipe
The increasing number of web sites and resources provided by internet has made the process of search and recovery of useful information for schooling and research more difficult. Even though the Net has extremely important sources, these are unknown for the majority of traditional search engines. This is what it is known as “The Deep Net”. To access this small universe of internet, it is necessary to know the mechanisms, strategies and tools that facilitates and guarantee the achievement of our objectives.
La lluvia ácida: un fenómeno fisicoquímico de ocurrencia local
(Corporación Universitaria Lasallista, 2004) Garcés Giraldo, Luís Fernando; Hernández Ángel, Marta Lucía
Acid rain is a phenomena associated to high production, depending mainly of fossilized fuel consuming and of certain agro cultural practices as burnings, which release several substances like sulphur and nitrogen oxides to the atmosphere, aporting the raw material to make up the sulphuric and nitric acids which later return to the hearth surface as liquids as sprays and affect the natural ecosystems. Rain water is slightly acid because it contains carbonic acid, formed from the atmospheric carbonic dioxide. Rain, which usually has a pH of approximately 5.6, can reach a measure close to 7.0, due to the presence of other alkaline substances in the atmosphere, and those substances neutralize the carbonic acid.
Fotocatálisis de aguas residuales de la industria textil utilizando colector solar
(Corporación Universitaria Lasallista, 2004) Garcés Giraldo, Luís Fernando; Peñuela Mesa, Gustavo Antonio
Introduction: Photocatalysis made with sun light appears as a simple and economic alternative to treat wastewater, colored with dyes from the textile industry. The use of this technology for the degradation and mineralization the 84 orange reactive dyes, can open a new route different from the traditional oxidation processes. Objective: To study the photocatalysis with TiO2 in colored wastewater using a sunlight collector. Materials and Methods: A sunlight collector made up by three modules (each one made up by eight glass Schott-Duran pipes) was used. Each glass pipe is 48 cm of external diameter and 150 cm long and also contains an aluminum sheet, which allows the reflection of sunlight. The whole device had a re-circulation bomb and a thank, the sunlight collector had an inclination of 6 degrees in comparison with the floor and was facing North because it must be located according to the geographic position of the place. Only one condition was modificated for each experiment with the objective of studying its influence in the dye’s degradation. In this research work we show different combinations of hydrogen peroxide, titanium dioxide and air, used in the photo catalysis of the 84 orange reactive and waste water samples from textile industry. Results: The optimal concentrations found for 84 orange reactive in a 340 mg/lL concentration are: 40 mg/L of titanium dioxide and 2 mg/L of hydrogen peroxide with no air injection. Conclusion: With an appropriate quantity of titanium dioxide and a well calculated concentration of hydrogen peroxide, very good concentration percentages of the 84 orange reactive and colored waste waters are obtained, besides of high mineralization percentages.
El desarrollo en Colombia: historia de una hegemonía discursiva
(Corporación Universitaria Laslallista, 2004) Restrepo Velásquez, Juan Carlos
Introduction: The following text is a part of the finds of the research “EXPLORATORY ANALYSIS OF THE CONCEPT OF DEVELOPMENT INCLUDED IN THE COLOMBIAN DEVELOPMENT PLANS. CONTINUITIES AND FRACTURES. PERIOD 1950-2000”,which tries to establish, theoretically and from an exploratory analysis line, the historical practice of the concept of development in Colombia, according to the concept of development that appears in its National Development Plans and in similar documents during the second half of the XX Century. This research produced three finds: First, the constant conception of economical growth as the only idea of development. Second, evident fractures and discontinuities in the development speech, due to the imperant focuses about the topic and, third, the foreign speech practices in Colombia’s development. This latter find is the one presented with the title: COLOMBIAN DEVELOPMENT: HISTORY OF A HEGEMONICAL SPEECH. Materials and Methods: This research work is theoretical and is made under qualitative research parameters, allowing us to establish a scientific method to have an adequate approach to the research object and interact with it. The approach of this research is established by following the route offered by the documental and historical research method in the multicyclical framework of qualitative research. In this route, hermeneutics (attained to the hermeneuticalhistorical method) was the focus used to approach the interpretation of texts and the appropriate contexts, with the analysis of contents´ method. By the use of analysis matrixes, common elements are inferred and those, from the exploration we are making, have been called finds. They are duly documented and evidenced afterwards. Results and Main Conclusions: From the speeches used for the national development plans, effects of truth and reality have been created, and this fact has implied a control of the used words that, at the end of the day, is the one that produces the hegemonical speech in this case. This sort of speeches have been consolidated from the profesionalization of development and its raising to an institutional level.

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